PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23682865-7 2014 H2S is produced endogenously by cystathionine-beta-synthase and cystathionine-gamma-lyase in the rat carotid body, and its intracellular concentration is dependent upon the balance between its enzymatic generation and its mitochondrial breakdown. Hydrogen Sulfide 0-3 cystathionine beta synthase Rattus norvegicus 32-59